The kinetics of thyroid secretion after termination of stimulation by 100 μU/ml bovine thyroid stimulating hormone (TSH) or 5 mM cyclic AMP (cAMP) were studied using perfused canine thyroid lobes. All experiments were performed as paired comparisons, one thyroid lobe acting as a control continuing to receive infusion of the stimulator. 2.5 h after termination of TSH infusion, the secretion of thyroxine (T4), 3,5,3′-triiodothyronine (T3), and 3,3′,5′-triiodothyronine (rT3) was not significantly different from that of the control lobes. After cessation of cAMP infusion, the secretion of T4 continued unaffected for ∼40 min. Then a gradual decline in T4 release occurred. The secretion of T3 and rT3 decreased somewhat earlier leading to a transient phase with increases in the T4:T3 and T4:rT3 ratios in the thyroid effluent.
Peter Laurberg
Title and authors | Publication | Year |
---|---|---|
Increased thyroidal T4 to T3 conversion in autonomously functioning thyroid adenoma: From euthyroidism to thyrotoxicosis
M Solter, L Posavec, D Solter, V Vargek-Solter |
Annales d'Endocrinologie | 2011 |
Thyroid status in pregnant Mauritian women
AH Subratty, Y Peerbacus |
Nutrition & Food Science | 2003 |
The Regulation of Thyroid Function in Pregnancy: Pathways of Endocrine Adaptation from Physiology to Pathology
D Glinoer |
Endocrine reviews | 1997 |
Contemporary Endocrinology
SH Ingbar |
1985 | |
Mechanisms governing the relative proportions of thyroxine and 3,5,3′-triiodothyronine in thyroid secretion
P Laurberg |
Metabolism | 1984 |
Thyroid Function Tests in the Dog: Recent Concepts
DC Ferguson |
Veterinary Clinics of North America Small Animal Practice | 1984 |
THYROID HORMONE SECRETION RATES: RESPONSE TO ENDOGENOUS AND EXOGENOUS TSH IN MAN DURING SURGERY
L Tegler, J Gillquist, R Lindvall, S Almqvist, P Roos |
Clinical Endocrinology | 1983 |
Thyroidal release after oral administration of TRH in normal subjects
J Golstein, D Glinoer, M Bonnyns, L Vanhaelst |
Journal of Endocrinological Investigation | 1983 |